how does rails know if it should submit a form to update or create?

rubyonrails-talk
1

how does rails know if it should submit a form to update or create? the form is rendered by either new or edit so on submission how does rails know which action originally rendered the form?

2

by checking the value returned by `object.persisted?`.

3

Have a look at the html for the edit and new pages and I think you will see a difference. Look at the form tag in particular.

Colin

4

they’re the same, <%= render ‘form’ %> is all they contain other than links and either

New model

or

Editing model

5

they’re the same, <%= render ‘form’ %> is all they contain other than links and either

New model

or

Editing model

I said to look at the HTML not your source code. The form tag is the HTML generated by the form_for code.

Also please don’t top post, as I have asked before. Thanks.

Colin